The Environmental Protection Agency is planning to submit an information collection requests (ICRs) ``Emissions Certification and Compliance Requirements for Nonroad Compression-ignition Engines and On-highway Heavy Duty Engines (Revision),'' (EPA ICR No. 1684.20, OMB Control No. 2060-0287) to the Office of Management and Budget (OMB) for review and approval in accordance with the Paperwork Reduction Act (44 U.S.C. 3501 et seq.). Before doing so, EPA is soliciting public comments on specific aspects of the proposed information collections as described below. This is a proposed extension of the ICR, which is currently approved through March 31, 2023. An Agency may not conduct or sponsor and a person is not required to respond to a collection of information unless it displays a currently valid OMB control number.